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Bolt molding process requiring chamfering and milling multiple grooves

A molding process and chamfering technology, which is applied to bolts, threaded fasteners, connecting components, etc., can solve the problems of complex bolt processing technology and low production efficiency, and achieve the effect of high production efficiency and simplified production process

Active Publication Date: 2012-05-16
浙江明泰控股发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing complex processing technology and low production efficiency of bolts that require chamfering and multiple grooves, the present invention provides a bolt forming process that requires chamfering and multiple grooves. The process steps are simple and the production efficiency is high.

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  • Bolt molding process requiring chamfering and milling multiple grooves
  • Bolt molding process requiring chamfering and milling multiple grooves
  • Bolt molding process requiring chamfering and milling multiple grooves

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing:

[0012] Depend on figure 1 As shown, the bolt forming process that requires chamfering and multiple grooves is processed in the following steps:

[0013] ①Cold heading, respectively process the nut 1, screw 2, chamfer 3 and groove 4 at the front end of the screw 2 in sequence. The inner sleeve of the mold for cold heading groove 4 adopts two kinds of materials with different hardness, and the material of the stamping groove part Compared with other parts of stamping, the hardness of the material is low and has a certain toughness; when the cold heading groove is 4, the mold will not break, and the blank of the bolt with chamfering and multi-groove is realized for cold heading processing; the upper part of the mold adopts hardness Higher hard alloy (such as CD650), and the lower part corresponding to the groove 4 adopts hard alloy with relatively low hardness and certain tou...

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Abstract

The invention provides a bolt molding process requiring chamfering and milling multiple grooves, and mainly solves the problem of complicated manufacture process and low production efficiency of the conventional bolt requiring chamfering and milling multiple grooves. The bolt molding process requiring chamfering and milling multiple grooves comprises the following steps: (1) cold upsetting: manufacturing a nut (1), a screw rod (2), a chamfer (3) at the front end of the screw rod (2) and a groove in turn respectively, wherein the mould of the cold upsetting groove (4) is made of two materials with different hardness, the material stamping the groove part has hardness lower than the material stamping other positions, and has certain toughness; and (2) thread rolling: manufacturing threads (5) on the screw rod (2) by using a thread rolling machine. The bolt molding process requiring chamfering and milling multiple grooves has simple steps and high production efficiency.

Description

technical field [0001] The invention relates to a bolt processing method, in particular to a bolt forming process requiring chamfering and multiple grooves. Background technique [0002] At present, there is a kind of bolt whose end is provided with chamfers and has grooves on the side wall of the end, such as grounding bolts, which are mainly used for grounding electrical products, and are convenient to be screwed into metal parts pre-buried in the ground. The above-mentioned bolts are mainly processed according to the following steps: 1. Cold heading, processing the nut and screw; 2. Car chamfering, turning the chamfer at the end of the screw; It is difficult for the upsetting mold to cold-head the groove, and the mold will break. Therefore, the milling machine is usually used to mill out the groove; 4. Thread rolling, use the thread rolling machine to process the external threads of the screw. The existing chamfering and multi-groove bolts have complicated processing tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21K1/44
Inventor 郑守田郑小兰赵志伟
Owner 浙江明泰控股发展股份有限公司